99chambers

Illinois State Senate seat · lines in effect since 2022

Illinois Legislative District 10

A district of about 213,000 people, 26% Hispanic, 40% of adults with a bachelor's degree. It votes D+12.1 relative to the nation for president.

Rob Martwick (D) · since Nov 3, 2020Next election Nov 7, 2028

2024 election

Nov 5, 2024
  1. Rob Martwick (D) · won60.9%
  2. Jonathon Luers (R)39.1%

Full results →

Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET

Where it sits among all 59 seats

Every Illinois State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

D+12.132nd most
Democratic
Most DemocraticMost Republican30th seat · the majority lineDistrict 10

Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Every election for this seat

18 races since 1970; the seat changed party 2 times. District numbers are redrawn after each census: each group is one set of lines.

YearWinnerRunner-upWon by
Lines first used in 2022
2024Rob Martwick (D)Jonathon Luers (R)21.8
2022Rob Martwick (D)—Unopposed
Lines first used in 2012
2020Rob Martwick (D)Anthony Beckman (R)7.6
2016John G. Mulroe (D)—Unopposed
2012John G. Mulroe (D)—Unopposed
Lines first used in 2002
2010John G. Mulroe (D)Brian G. Doherty (R)10.8
2006James A. Deleo (D)—Unopposed
2002James A. Deleo (D)—Unopposed
Lines first used in 1992
1998James A. Deleo (D)—Unopposed
1996James A. Deleo (D)—Unopposed
1992James A. Deleo (D)—Unopposed
Lines first used in 1982
1988John A. Darco Jr. (D)—Unopposed
1984John A. Darco Jr. (D)—Unopposed
1982John A. Darco Jr. (D)—Unopposed
Lines first used in 1972
1978Aldo A. Deangelis (R)FlipRobert T. Lane (D)16.1
1974Robert T. Lane (D)FlipJack E. Walker (R)3.9
1972Jack E. Walker (R)Stanley A. Strzelecki (D)27.0
Lines first used in 1962
1970Esther Saperstein (D)Herbert P. Arnois (R)43.4

Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Districts that overlap District 10

The state's districts in other chambers that share residents with this one, and the share of District 10's area in each.

U.S. House
IL-5 58%, IL-3 29%, IL-8 8%
Illinois House of Representatives
RD-20 67%, RD-19 33%

Who lives here, compared

Grey bars show the spread of all 59 seats. Small marks are other seats in Illinois. The black marker is District 10.

Adults with a bachelor's degree40% 60th pct · 24th of 59 in IL

Higher than 60% of seats.

White adults without a degree38% 60th pct · 24th of 59 in IL

Higher than 60% of seats.

Hispanic residents26% 79th pct · 13th of 59 in IL

Higher than 79% of seats.

Black residents2% 7th pct · 55th of 59 in IL

Lower than 93% of seats.

Asian residents7% 62nd pct · 23rd of 59 in IL

Higher than 62% of seats.

People per square mile7,994 83rd pct · 11th of 59 in IL

Denser than 83% of seats.

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET

Seats most like this one

Nearest seats on demographics, density and lean. 1 of the 4 flipped this year.

District 31
30% Hispanic · 38% college gradsD+19.6Not up in 2026District 49
43% college gradsD+11.6Not up in 2026District 33
46% college gradsD+3.4Flipped DDistrict 25
41% Hispanic · 35% college gradsD+18.9Not up in 2026

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET